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UNITED STATES PATENT OF F 1 E? JEREMY BRADLEY, oF' CEDAR. FALLS, IOWA, assieuon TO ,nnrsntr, WALTERPASHLEY, ANDS. B. HEWETT, JR.

lmeeovi-zo. EXCAVAT OR.

Specification forming part of Letters Patent No. 5 7,03S, dated August 7, 1866.

To allwhmn itmmy concern:

Be it known that I, JEREMYBRADJQEYfof Cedar Falls, in the county of Black Hawk and State of Iowa, have invented .a new and 1mproved Excavator and Grader and I do hereby declare that the followingis a full, clear,

and exact descriptionthereof, reference being i had to the accompanying drawings, mfakinga part of this specification, in which-- Figure l is an elevation of one side of my machine. Fig.2 is a plan View .ofthe same. Fig. 3, Sheet- 2, is a longitudinal section, taken vertically through the center of the. machine. Fig.4, Sheet 2, is longitudinal section, taken vertically through the centerof the front part of the machine, showingrthe shovel moved back i to. the termination of its. rear stroke. Fig. 5, Sheet 2, is asimilar view, .showingthe plow elevated. i l

Similar letters of reference indicate corresponding parts in the severalfigures.

i This invention relates to .certain novel improvements on machines for-excavating and. grading; also, for diggingditchestor-trenches.

Figs. land 2.

for the purpose of draining lands.

The main object of my invention is to em" ploy areciprocating shovel in conjunction with a scoop aud elevator for the purpose of fit-- cllitating thedeliveryof the earth, which is gathered in the scoopnpon the elevator, which 1 latter conveys the earth .to a suitable height and deposits it upon an endless iapron that discharges the earth alongside ,of the machine,

all as will-be hereinafter described. Q

Another object ofmy invention is to sustain the forward part of the machine uponitwo tran sportin g-wheels by'me'ans of a long tongue ,or lever and a chain which passes over a: Windlass in such mannerthat thedriver, who

is mounted upon the axle of said wheels can elevate or depress the plow-pointsatpleasure, a

as will be hereinafter described. Another objectof my invention. is to. combine two turning plows with an inclined scoop and a shovel in such manner that the plowed earth is delivered intothe scoop by the plows, and thence moved backward upon the ele- Vator by the shovels, thereby preventing the banking up of the earth in front of the machine or upon. the scoop and the undue friction and resistance which would be caused by such accumulation .of earth, aswill be herein,

after. described. up i e To enableflothers skilled in the art to un- .derstand myinvention, I willdescrihe its con- ,struction and operation. V

In the accompanying drawings, A Arepresent two transporting-wheels, which are made of sufficient size tosupp ort the rear part of the machine,

B B are two beams, which are secured together by transverse braces and provided with rollers a a at their ends,.and also at intermediate points between the ends, as. shown in Fig, 13. :These beams ,B constitute ai'ramefor supporting the endless elevatingapron c, i'o'r which purpose these beams are secured to the axle A of the wheelsA in an inclined position.

i The apron a. is provided with transverse slots eiorcarryingupthe earth, anditis applied to the end rollers, a a, so as to be driven by means of a chain, 7), which passes over a spurred pulley, A on one of the transporting-wheels, A, andflalso over a spurred pulley, (0 on the endof the uppermost roller, 01., as shown in To the upper portion of the frame 13, behind .the axle-tree A, .a frame, 0, is suitably secured ibrsupporting an endless apron, G", that is arranged at right angles to the elevatingapron a and below the :upper or discharging end of this latter apron. The frame Dis provided with two rollers, over which the'apron O is stretched. One end of the frame Oprojects out some distance from the side of the frame B for the purpose of discharging the earth at the proper distance from the trench. This apron (J is moved by means of ashaft, GZ'which is connected at one, end to the center of the wheel .or pulley; a by means ofa gimbaljoint, b and at the other. end itis provided with a bevel-wheehc, which engages with a bevel-wheel, c, .on the forward endof the shai'tof the outer roller, ,over which the apron 0 passes, as showninFigs. 1 and 2.

The lowerend of the apron-frame B hastwo wertical side-boards,1) D, securely bolted to it, which form twosides of the scoop, thebottom D of which is inclined forward and suitably shod on its lower edge for the purpose of scooping up the earth that is loosened bythe twoplows E E. The rear portion of the bot tom of the scoop is carried over the lowerportion of .the endless apron a a sufficient distance to discharge the earth upon this apron,

so that it will be carried up and discharged upon the apron O.

The two plows E E are constructed with curved mold-boards, which are arranged so as to turn the earth in opposite directions toward the center of the scoop, so that thelatter will gather and scrape up the earth thus loosened. The land-sides of the two plows E E are in planes corresponding to the outside surfaces of the respective sides I) of the scoop.

The standards at d of the two plows E E are secured rigidly to a transverse beam, F, at vtheir upper ends, and to the center of this G is pivoted in a suitable manner to the axle H of two small transporting-wheels, J J, to

' which axle a draft-tongue, H, is applied.

In the center of the bolster G, I erect a post,

K, which is strengthened by means of two braces, K, so that it shall resist lateral strain. This post K passes through a longitudinal slot which is made through the longitudinal beam F and prevents this beam from having any lateral play. The forward end of the beam F has a strong chain, g, connected to it, which passes around a windlass, it, near the upper end of the central post, K. This windlass h is supported in bearings behind the post K, and provided with a crank, it, and a pawl and ratchet, as shown in Figs. 1 and 2, so that the driver, sitting in a seat, L, can' elevate or depress the forward ends of the plows and scoop atpleasure while the machine is in operation. The drivers seat L being secured to the post K, it will be seen that thedriver does not lift his own weight while raising the front part of the machine.

A transverse shaft, M, is applied to the frame Bnear the rear end of the bottom of the scoop, and on the ends of this shaft eccentries or crank-wheels N N are keyed. The

wheel N has a spurred pulley, j, fastened to it, over which a chain-belt, 70, passes, that also passes around a spurred pulley, k, on the transporting-wheel A.

To eccentric-pins projecting from the wheels N N pitman-rods 1 are pivoted, the forward ends of which are secured to a frame, 1?, that extends over the scoop, as shown in Figs. 1 and 2. Through the forward ends of the rods P pins m pass and enter rectangular grooves a formed in plates which are secured to the outer sides of the sides of the scoop. These rectangular slots form camways for guiding the frame P'when the machine is in motion and giving to it a forward-andupward movement and a. backward-and-downward movement.

To the center of the transverse bar of the frame F, I suitably secure a shovel, R, which is intended for shoveling the earth from the scoop upon the endless elevator 0. During the backward movement of the shovel the pins m are in the lower portions of the camslots at, and during the return strokes of the shovel said pins m move in the upper portions of the cam-slots. B y this movement the shovel is caused to rise over the earth in the scoop during its backward strokes.

At the rear ends of the side-boards of the scoop two hollow posts, S S, are erected, the lower portions of which are slotted for the purpose of receiving the pitman-rods P. .These rods are suspended by means of the springs t, Fig. 4, which are inclosed in the upper portions of the posts, which springs will lift the shovel and its frame at the termination of the forward strokes thereof to the upper portions of the slots n.

Having thus described my invention, what.

I claim as new, and desire to secure by Letters Patent, is-

1. Combining with the scoop of a ditching or excavating and grading machine a reciprocating shovel which is so arranged that it will automatically keep the forward part of the scoop clear of earth, substantially as described.

2.The combination of the scoop D and elevator a. with a shovel, R, operating substantially as described.

3. The arrangement of theplows E E in front of the scoop D, in combination with a shovel, It, and a contrivance for elevating earth, substantially as described.

4. Sustaining the forward part of the ma- 1 chine upon transporting-wheels J by means of the beams F F, chain g, and Windlass h, the

latter being supported upon a post, K, which passes through a slot in said beam F, substantially as described.

5. Connecting the transverse beam F to the bolster G by means of a jointed rod, G, substantially as described.

6. Transmitting motion to the endless discharging-apron from the upper roller, a, of the elevating-apron a by means of a shaft, 0 agimbal-joint, b and spur-wheels c c, substantially as described.

JEREMY BRADLEY.

Witnesses CHAS. 1?. BROWN, WM. B. HUMILL. 

